Back support for a rucksack



FIG. 1 is a front view of the back support for a rucksack showing my new design.

FIG. 2 is a rear view thereof.

FIG. 3 is a left side view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a top view thereof.

FIG. 6 is a bottom view thereof.

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a front view of the back support for a rucksack 10 as it may be installed and used with a rucksack. 

The ornamental design for a back support for a rucksack, as shown. 